JPH02115241A - Expansive and expanded alkenyl aromatic polymer particle - Google Patents
Expansive and expanded alkenyl aromatic polymer particleInfo
- Publication number
- JPH02115241A JPH02115241A JP1242374A JP24237489A JPH02115241A JP H02115241 A JPH02115241 A JP H02115241A JP 1242374 A JP1242374 A JP 1242374A JP 24237489 A JP24237489 A JP 24237489A JP H02115241 A JPH02115241 A JP H02115241A
- Authority
- JP
- Japan
- Prior art keywords
- alkenyl aromatic
- blowing agent
- aromatic polymer
- chloroethane
- difluoro
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002245 particle Substances 0.000 title claims abstract description 35
- 229920000642 polymer Polymers 0.000 title claims abstract description 31
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000000203 mixture Substances 0.000 claims abstract description 22
- CRSOQBOWXPBRES-UHFFFAOYSA-N neopentane Chemical compound CC(C)(C)C CRSOQBOWXPBRES-UHFFFAOYSA-N 0.000 claims abstract description 14
- BHNZEZWIUMJCGF-UHFFFAOYSA-N 1-chloro-1,1-difluoroethane Chemical compound CC(F)(F)Cl BHNZEZWIUMJCGF-UHFFFAOYSA-N 0.000 claims abstract description 12
- QWTDNUCVQCZILF-UHFFFAOYSA-N isopentane Chemical compound CCC(C)C QWTDNUCVQCZILF-UHFFFAOYSA-N 0.000 claims abstract 10
- AFABGHUZZDYHJO-UHFFFAOYSA-N dimethyl butane Natural products CCCC(C)C AFABGHUZZDYHJO-UHFFFAOYSA-N 0.000 claims abstract 5
- UOCLXMDMGBRAIB-UHFFFAOYSA-N 1,1,1-trichloroethane Chemical compound CC(Cl)(Cl)Cl UOCLXMDMGBRAIB-UHFFFAOYSA-N 0.000 claims abstract 2
- 239000004604 Blowing Agent Substances 0.000 claims description 30
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- HRYZWHHZPQKTII-UHFFFAOYSA-N chloroethane Chemical compound CCCl HRYZWHHZPQKTII-UHFFFAOYSA-N 0.000 claims 1
- PXBRQCKWGAHEHS-UHFFFAOYSA-N dichlorodifluoromethane Chemical compound FC(F)(Cl)Cl PXBRQCKWGAHEHS-UHFFFAOYSA-N 0.000 abstract description 9
- 239000004793 Polystyrene Substances 0.000 abstract description 7
- 229920002223 polystyrene Polymers 0.000 abstract description 7
- 239000004088 foaming agent Substances 0.000 abstract description 5
- -1 and (C) optionally Chemical compound 0.000 abstract description 3
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- UMNKXPULIDJLSU-UHFFFAOYSA-N dichlorofluoromethane Chemical compound FC(Cl)Cl UMNKXPULIDJLSU-UHFFFAOYSA-N 0.000 abstract 1
- 229940099364 dichlorofluoromethane Drugs 0.000 abstract 1
- 230000008961 swelling Effects 0.000 abstract 1
- 238000005187 foaming Methods 0.000 description 9
- 238000001125 extrusion Methods 0.000 description 7
- 235000019404 dichlorodifluoromethane Nutrition 0.000 description 6
- 239000007787 solid Substances 0.000 description 5
- 230000032683 aging Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- MYRTYDVEIRVNKP-UHFFFAOYSA-N 1,2-Divinylbenzene Chemical compound C=CC1=CC=CC=C1C=C MYRTYDVEIRVNKP-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 239000002984 plastic foam Substances 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- JLBJTVDPSNHSKJ-UHFFFAOYSA-N 4-Methylstyrene Chemical compound CC1=CC=C(C=C)C=C1 JLBJTVDPSNHSKJ-UHFFFAOYSA-N 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 239000004338 Dichlorodifluoromethane Substances 0.000 description 1
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 125000002029 aromatic hydrocarbon group Chemical group 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 150000001555 benzenes Chemical class 0.000 description 1
- MPMBRWOOISTHJV-UHFFFAOYSA-N but-1-enylbenzene Chemical compound CCC=CC1=CC=CC=C1 MPMBRWOOISTHJV-UHFFFAOYSA-N 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000010339 dilation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920006248 expandable polystyrene Polymers 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 150000005826 halohydrocarbons Chemical group 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000034563 regulation of cell size Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 210000000689 upper leg Anatomy 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
- C08J9/14—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
- C08J9/149—Mixtures of blowing agents covered by more than one of the groups C08J9/141 - C08J9/143
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2325/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
- C08J2325/02—Homopolymers or copolymers of hydrocarbons
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
- Y10S264/05—Use of one or more blowing agents together
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S521/00—Synthetic resins or natural rubbers -- part of the class 520 series
- Y10S521/91—Plural blowing agents for producing nonpolyurethane cellular products
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は膨張性アルケニル芳香族ポリマー粒子及び膨張
したアルケニル芳香族ポリマー粒子に関する。本発明の
膨張性アルケニル芳香族ポリマー粒子は１．１−ジフル
オロ−１−クロロエタンとノルマルペンタン、インペン
タ／及びネオペンタンの１又は２以上かららる特定の揮
発性流体発泡剤を用いてつくられる。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to expandable alkenyl aromatic polymer particles and expanded alkenyl aromatic polymer particles. The expandable alkenyl aromatic polymer particles of the present invention are made using specific volatile fluid blowing agents consisting of 1,1-difluoro-1-chloroethane and one or more of normal pentane, impenta/and neopentane.
（従来技術）
膨張性の及び膨張したアルケニル芳香族ポリマー粒子（
ビーズ）は多くの用途にとって極めて有用であることが
仰られている。一つの特に望ましい用途は物品を輸送用
に包装する際の保護材である。代表的な材料は米国特許
第３．０６６，３８２号、第３．１８８，２６４号、第
３，２５１，７２８号及び第３，９３３，９５９号に開
示されている。膨張性アルケニル芳香族ポリマー粒子の
別の用途として成形材料がある。(Prior Art) Expandable and expanded alkenyl aromatic polymer particles (
beads) are said to be extremely useful for many applications. One particularly desirable application is as a protective material when packaging items for shipping. Representative materials are disclosed in U.S. Pat. No. 3,066,382, U.S. Pat. No. 3,188,264, U.S. Pat. Another use for expandable alkenyl aromatic polymer particles is as molding materials.
完全ハロゲン化クロロフルオロカーボンは地球のオゾン
層に対し好ましくない効果を示すとされている。そのた
めかかる完全ハロゲン化クロロフルオロカーボンの使用
をプラスチック発泡体の製造を含むあらゆる分野で減少
させまた排除する要求が出されている。Fully halogenated chlorofluorocarbons are known to have undesirable effects on the Earth's ozone layer. There is therefore a need to reduce or eliminate the use of such fully halogenated chlorofluorocarbons in all areas, including the manufacture of plastic foams.
ＢＣＦＣ−１４２ｂ（１，１−ジフルオロ−１−クロロ
エタン）はプラスチック発泡製品の製造においてＣＦＣ
−１２（ジクロロジフルオロメタン）の可能性のある代
替品の一つとして矧られている。BCFC-142b (1,1-difluoro-1-chloroethane) is a CFC used in the production of plastic foam products.
-12 (dichlorodifluoromethane) is considered as one of the possible substitutes.
（発明の開示）
本発明はアルケニル芳香族ポリマーと、１，１−ジフル
オロ−１−クロロエタン基びにノルマルペンタン（Ｓ−
ペンタン）、インペンタン及びネオペンタンの１又は２
以上からなる揮発性流体発泡剤からなることを特徴とす
る膨脹性粒子を提供する。(Disclosure of the Invention) The present invention provides alkenyl aromatic polymers and 1,1-difluoro-1-chloroethane groups and normal pentane (S-
pentane), impentane and neopentane 1 or 2
The present invention provides expandable particles characterized by comprising the volatile fluid blowing agent as described above.
本発明はヱだ不発明の膨張性アルケニル芳香族ポリマー
粒子から製造された膨張した粒子をも提供する。The present invention also provides expanded particles made from the inventive expandable alkenyl aromatic polymer particles.
意外なことに、ＣＦＣ−１２を用いて裏遺した膨張性及
び膨張したアルケニル芳香族ポリマー粒子と比較して、
予期されるよりもより多量のＥＣＦＣ−１４２ｂを膨張
性の及び膨張したアルケニル芳香族ポリマーに導入でき
る。Surprisingly, compared to the expandable and expanded alkenyl aromatic polymer particles retained using CFC-12,
Higher amounts of ECFC-142b than expected can be incorporated into expandable and expanded alkenyl aromatic polymers.
本発明の膨張性及び膨張した粒子は特定の発泡剤混合物
を言方するアルケニル芳香族ポリマーである。The expandable and expanded particles of this invention are alkenyl aromatic polymers referring to specific blowing agent mixtures.
本発明においてアルケニル芳香族ポリマーなる用語は、
化学的に結合した形において、−形成
％式％
但しＡデはベンゼンシリーズの芳香族炭化水素基又は芳
香族ハロ炭化水素基であり、Ｒは水素又はメチル基であ
る、
で示される少な（ともｌのアルケニル芳香族化合物を少
なくとも５０７ｉ％含有するポリマー又はコポリマーを
包含する。かかるアルケニル芳香族ポリマーの例とじ又
はスチレン、α−メテルスナレン、０−メチルスチレン
、鶏−メチルスチレン、ｐ−メチルスチレン、ａｒ−エ
チルスチレン、ａｔ−ヒニルステレン、αｒ−クロロス
チレン又ハαデーブロモスチレンの固体状ホモポリマー
、上記したようなアルケニル芳香族化合物の２又は３以
上の又はそれらとジビニルベンゼン、メチルメタクリレ
ート又はアクリ−ニトリル等の他の容易に重合しうる少
量成分としてのオレフィン性化合物との固体状コポリマ
ーがある。In the present invention, the term alkenyl aromatic polymer refers to
In the chemically bonded form, -formation% formula % where A is an aromatic hydrocarbon group of the benzene series or an aromatic halohydrocarbon group, and R is hydrogen or a methyl group. Examples of such alkenyl aromatic polymers include styrene, α-methelsunarene, 0-methylstyrene, avian-methylstyrene, p-methylstyrene, ar. - solid homopolymers of ethylstyrene, at-hinylsterene, αr-chlorostyrene or α-debromostyrene, two or more of the above-mentioned alkenyl aromatic compounds or together with divinylbenzene, methyl methacrylate or acryl-nitrile; There are also solid copolymers with other easily polymerizable minor components such as olefinic compounds.
特に好ましいアルケニル芳香族ポリマーは１００，００
０〜３００，０００のｘｉｉｔ平均分子１ｔ（Ａｆ−を
有するポリスチレンである。A particularly preferred alkenyl aromatic polymer is 100,000
It is a polystyrene with a xiit average molecular It (Af-) of 0 to 300,000.
発泡剤は１．１−ジフルオロ−１−クロロエタンとノル
マルペンタン（Ｓ−ペンタン）、インペンタン及ヒネオ
ペンタンの１又は２以上からなる。この発泡剤は任意成
分を含み５るがその１つとして１．１．ｌ−トリクロロ
エタンがあり、これは好ましくは発泡剤浪合物の全重量
の約５０重量％以下の量含有される。The blowing agent consists of one or more of 1,1-difluoro-1-chloroethane, normal pentane (S-pentane), impentane, and hineopentane. This foaming agent contains optional ingredients, including 1.1. 1-Trichloroethane is present, preferably in an amount up to about 50% by weight of the total blowing agent mixture.
本発明の発泡剤は１．１−ジフルオロ−１−クロロエタ
ンを好ましくは少なくとも１０重量％、最も好ましくは
少なくとも２０重量％含有し、残部が前記ペンタン類の
１又は２以上と任意に１＃ｌ＃１−トリクロロエタンで
あるものである。The blowing agent of the present invention preferably contains at least 10% by weight, most preferably at least 20% by weight of 1,1-difluoro-1-chloroethane, the balance being one or more of the aforementioned pentanes and optionally 1#l#. It is 1-trichloroethane.
発泡剤は通常全調合組成物重量の５〜１５チに相当する
量用いられる。膨張（発泡）後発泡剤の１部又は全部が
膨張したアルケニル芳香族ポリマー物品中に残る場合と
残らない場合がありうる。アルケニル芳香族ポリマーと
発泡剤の粘性溶融物を加圧下に発泡製置より低温に冷却
し次いでｌ又は２以上のストランドをより低い圧又は大
気圧中に通しこのストランドを固体状又は非熱可塑化状
態に急冷することによって発泡性アルケニル芳香族ポリ
マー粒子の押出を行うことは周知である。またこれらの
アルケニル芳香族ポリマー粒子を直接ダイから押し出し
て膨張させることも可能である。The blowing agent is usually used in an amount corresponding to 5 to 15 inches of the total weight of the formulation. After expansion (foaming) some or all of the blowing agent may or may not remain in the expanded alkenyl aromatic polymer article. The viscous melt of the alkenyl aromatic polymer and blowing agent is cooled under pressure to a lower temperature than the foaming process and one or more strands are passed through lower pressure or atmospheric pressure to form the strands into a solid or non-thermoplastic form. It is well known to carry out the extrusion of expandable alkenyl aromatic polymer particles by quenching to a state of quenching. It is also possible to directly extrude and expand these alkenyl aromatic polymer particles through a die.
またアルケニル芳香族ポリマー／発泡剤混合物中に周知
の他の添加剤、たとえば龜燃剤、安定剤、充填剤、静電
防止剤、着色剤等を含有することも可能である。また均
一押出し発泡体の製造においてダイから押出す前にアル
ケニル芳香族ポリマー／発泡剤混合物に気泡径コントロ
ール用添加剤として知られるＷ質を加えることもできる
。It is also possible to include other well-known additives in the alkenyl aromatic polymer/blowing agent mixture, such as retardants, stabilizers, fillers, antistatic agents, colorants, and the like. Furthermore, in the production of homogeneous extrusion foams, a W material known as an additive for cell size control can be added to the alkenyl aromatic polymer/blowing agent mixture before extrusion from a die.
製造された膨張性アルケニル芳香族ポリマー粒子は適宜
の形状をとりうるが、包装用に適する形や膨張後成形目
的に適する形であることが特に好ましい。The expandable alkenyl aromatic polymer particles produced can have any suitable shape, but shapes suitable for packaging and post-expansion molding purposes are particularly preferred.
次の実施例と比較例は本発明を例証するものである。発
泡剤のＴＬ量う数は混合物（ポリマー／発泡剤混合物）
全重量に基つ（重重−である。発泡剤混会物チは発泡剤
混合物の全重量に基づく各発泡剤のｉｔチである。ポリ
スチレンは約２００，００００Ｍ５ｕをもち混合物の残
部を構成している。The following examples and comparative examples illustrate the invention. TL count of blowing agent is mixture (polymer/blowing agent mixture)
The weight of the blowing agent mixture is based on the total weight of each blowing agent, based on the total weight of the blowing agent mixture. There is.
密度の計算値として次の値を用いた。The following value was used as the calculated value of density.
ポリスチレン−１，０５１！／ｃｒｎ’ｃｆ／Ｃ１−）
１”、１．１−）リクａａｘタンー１．３３９Ｐ／ｃｃ
ノルマルペンタン−〇、６２６２ｆ！／ｃｒ−ＣＦＣ−
１２−−１，２９２ｆ／ｃｃ
ＥＣＦＣ−１４２ｂ−１，１２１！／ｃｃ膨脹性粒子の
密度の計算値（即ち計算された密度）は（１）ポリスチ
レンの重量−とポリスチレンの密度を掛けた値と（２Ｊ
各々の発泡剤の重１＊と各々の発泡剤の密度を掛け
た値との合計（すべての重量膚は全混合物型ｔＫ基づく
）である。Polystyrene-1,051! /crn'cf/C1-)
1”, 1.1-) Riku aax tan-1.339P/cc
Normal pentane-〇, 6262f! /cr-CFC-
12--1,292f/cc ECFC-142b-1,121! /cc The calculated density of the expandable particles (i.e., the calculated density) is (1) the weight of polystyrene multiplied by the density of polystyrene and (2J
The sum of the weight 1* of each blowing agent multiplied by the density of each blowing agent (all weights are based on total mixture type tK).
密度の実測値（即ち測定された密度）を得るためにまず
ペレットサンプルの重量をはかる。次いで既知容量のビ
ンに水と膨脹性粒子を入れて膨脹性粒子の容量即ちビン
の容量マイナス添加した水の各型を測定する。密度は実
測した重量を実測した容量で割った結果である◇これら
の膨張性ポリスチレン粒子をつくった後これらのサンプ
ルを大気圧の蒸気室中で通常約り５℃〜約１０５℃、好
ましくは約１０５℃の温度で制御された時間発泡させる
。To obtain the actual density value (ie, the measured density), the pellet sample is first weighed. Bottles of known volume are then filled with water and inflatable particles and the volume of inflatable particles, ie, the volume of the bottle minus each type of water added, is determined. Density is the result of measured weight divided by measured volume ◇ After these expandable polystyrene particles are made, these samples are typically heated in a steam chamber at atmospheric pressure to a temperature of about 5°C to about 105°C, preferably about Foaming is carried out at a temperature of 105° C. for a controlled time.
膨張した粒子は好ましくは約０．４０ボンド／立方フイ
ート（６，４ｙ／ｌ）以下、最も好ましくは約０．３０
ボンド／立方フイー） （４，８ｊｌ／ｌ ）以下のか
さ密度をもっている。The expanded particles are preferably less than or equal to about 0.40 bonds/cubic foot (6.4 y/l), most preferably about 0.30
It has a bulk density of less than (4.8 jl/l) (bond/cubic fee).
代表的な膨張（即ち発泡）手法（スキーム）は３分曝露
、次いで２４時間室条件下でのエージング、次いで３分
間曝露、次いで２回目の２４時間エージング、次いで３
回目の１１／２分間曝露、次いで３回目の２４時間エー
ジングかうなる。地の多くの膨張手法もｏＪ能であり、
不発明は膨張手法には限定されない。A typical expansion (i.e. foaming) scheme is a 3 minute exposure, then 24 hours aging under room conditions, then a 3 minute exposure, then a second 24 hour aging, then 3 minutes.
A second 11/2 minute exposure followed by a third 24 hour aging. Many expansion methods of the earth are also oJ abilities,
The invention is not limited to dilation techniques.
ダイで直辺発泡させて膨張した粒子を製造する別法では
＠度の実測値を測定するため発泡前にサンプルを取り出
す。In an alternative method of producing expanded particles by right-sided foaming in a die, a sample is removed prior to foaming to determine the actual value of degree.
これらの例ではポリスチレン／発泡剤混合物は周昶の方
法でポリスチレンと発泡剤の粘性混合物を加圧下に発泡
温度より低温で熱り塑化し、押し出し、冷却し、次いで
大気土中にストランドを通しこのストランドを固体状又
は非熱可塑化状態に急冷して膨脹性粒子とすることによ
って製造された。In these examples, the polystyrene/blowing agent mixture is prepared in the manner described by Zhou Chang by thermoplasticizing a viscous mixture of polystyrene and blowing agent at a temperature below the foaming temperature under pressure, extrusion, cooling, and then passing the strands through atmospheric soil. It was produced by rapidly cooling the strands to a solid or non-thermoplasticized state into expandable particles.
表１のすべての例における固体供給速度は４ボンド／吋
（８，８に９７時）だった。The solids feed rate in all examples in Table 1 was 4 bonds/inch (8,8 to 97 hours).
１１ＣＦＣ−１４２ｂを含有するサンプルを１ｔＪ５〜
１０６℃のタ°イ温度で押出した。ｎ−ペンタンとＣ’
ＦＣ−１２でつくったサンプルをダイでの発泡を防ぐた
め１００〜１０３℃で押出すと第１図に示すようにダイ
圧力が項九した。第１図は表１の例でのターイ圧力とデ
ルタの関係を示している。Sample containing 11CFC-142b from 1tJ5 to
Extrusion was carried out at a tie temperature of 106°C. n-pentane and C'
When a sample made with FC-12 was extruded at 100 to 103° C. to prevent foaming in the die, the die pressure was 9 times higher, as shown in FIG. FIG. 1 shows the relationship between Thai pressure and delta in the example of Table 1.
ペンタンと混合でき実用的なダイ圧力で膨張したビーズ
をり（りうる（、’ＦＣ−１２の最大１＋工約３０％で
あり、より多（の量のｔｉｃ’Ｆｃ−Ｌ４２ｂを用いる
ことのできる本発明とは対照的である。It is possible to mix expanded beads with pentane at practical die pressures (up to 1 + 30% of FC-12, and larger amounts of tic'Fc-L42b can be used). In contrast to the present invention.
＠度（デルタ）の計算値と実測値の差が約０．０７以下
である場合に優れた膨脹性粒子と膨張した粒子が得られ
る。Excellent expandable particles and expanded particles are obtained when the difference between the calculated and measured delta values is about 0.07 or less.
表１から明らかなように本発明の例におけるデルタ（密
腿の計算値と実測値の差）は０．０７以下である。但し
ＣＦＣ−１２の１０％（ＣＦＣ−１２／ｎ−ペンタンの
１０／９０混合物）のみ０．０７のデルタを示した。膨
脹性粒子は許容範囲の止端にある。ＣＦＣ−１２が発泡
剤混合物中２０％の量存在する場合（即ちＣＦＣ−１２
／ｓ−ペンタンの２０７８０混合物）、デルタは０．０
８であり許容されない膨脹性粒子を生ずる。デルタはダ
イ以前、ダイにおける又はダイな出た後のポリスチレン
／発泡剤混合物の発泡性（ｌｏａｍｉｎａｓｓ） （膨
脹性粒子も包含する）の尺度である。As is clear from Table 1, the delta (difference between the calculated value and the measured value of the dense thigh) in the example of the present invention is 0.07 or less. However, only 10% of CFC-12 (10/90 mixture of CFC-12/n-pentane) showed a delta of 0.07. Expandable particles are at the high end of the acceptable range. When CFC-12 is present in the blowing agent mixture in an amount of 20% (i.e. CFC-12
/s-pentane mixture), delta is 0.0
8, resulting in unacceptable expansive particles. Delta is a measure of the loaminass (including expandable particles) of the polystyrene/blowing agent mixture before, at, or after exiting the die.
表１ではダイ圧力をデルタに対してプロットしたもので
ある。ダイ圧力はダイから押出す直前のダイ中の圧力で
ある。In Table 1, die pressure is plotted against delta. Die pressure is the pressure in the die just before extrusion from the die.
膨張性ペレットの製造にＥＣＦＣ−１４２ｂを用いると
デルタ値が減少し、ダイ圧力を低下させることができ、
所定のダイかうより多くの押出を可能にする。またデル
タが小さいためダイの前、ダイにおいて又はダイの後で
発泡する傾向も減少する。The use of ECFC-142b in the production of expandable pellets reduces the delta value and reduces die pressure;
Allows for more extrusion in a given die. The lower delta also reduces the tendency for foaming to occur before, at, or after the die.
第１図はダイ圧力とデルタとの関係を示す線図である。 脣許出願人 代 埋 人 ザ ダウ FIG. 1 is a diagram showing the relationship between die pressure and delta. applicant for permission Substitute Man The Dow
Claims (1)
）１，１−ジフルオロ−１−クロロエタン及び（ｂ）（
１）ノルマルペンタン、 （２）イソペンタン、 （３）ネオペンタン又は （４）上記（１）、（２）及び（３）のいづれかの混合
物の１又は２以上からなる発泡剤 からなることを特徴とする膨脹性粒子。 ２、発泡性粒子の密度の計算値と実測値の差が０．０７
ｇ／ｃｍ＾３以下である請求項１記載の膨脹性粒子。 ３、発泡剤が１，１−ジフルオロ−１−クロロエタンを
少なくとも１０重量％含有する請求項１記載の膨張性粒
子。 ４、発泡剤が１，１−ジフルオロ−１−クロロエタンを
発泡剤混合物の全重量の少なくとも２０重量％含有する
請求項３記載の膨張性粒子。 ５、発泡剤が１，１，１−トリクロロエタンをも含有す
る請求項１〜４のいづれか１項記載の膨張性粒子。 ６、（Ａ）アルケニル芳香族ポリマー並びに（Ｂ）（ａ
）１，１−ジフルオロ−１−クロロエタン及び（ｂ）（
１）ノルマルペンタン、 （２）イソペンタン、 （３）ネオペンタン又は （４）上記（１）、（２）及び（３）のいづれかの混合
物の１又は２以上からなる発泡剤 からなることを特徴とする膨張した物品。 ７、アルケニル芳香族ポリマーと１，１−ジフルオロ−
１−クロロエタン並びにｎ−ペンタン、イソペンタン及
びネオペンタンの少なくとも１つからなることを特徴と
する発泡剤との熱可塑化した混合物を押出して膨張性ア
ルケニル芳香族ポリマー粒子を製造する方法。 ８、ペンタンがｎ−ペンタンである請求項６記載の方法
。 ９、１，１−ジフルオロ−１−クロロエタン並びに（１
）ノルマルペンタン、（２）イソペンタン及び（３）ネ
オペンタンの１又は２以上からなることを特徴とする混
合物のアルケニル芳香族ポリマー用の発泡剤としての使
用。[Claims] 1. (A) alkenyl aromatic polymer and (B) (a
) 1,1-difluoro-1-chloroethane and (b) (
It is characterized by comprising a blowing agent consisting of one or more of the following: 1) normal pentane, (2) isopentane, (3) neopentane, or (4) a mixture of any one of (1), (2), and (3) above. Expandable particles. 2. The difference between the calculated density of expandable particles and the measured value is 0.07.
The expandable particles according to claim 1, which have a particle size of less than g/cm^3. 3. Expandable particles according to claim 1, wherein the blowing agent contains at least 10% by weight of 1,1-difluoro-1-chloroethane. 4. Expandable particles according to claim 3, wherein the blowing agent contains 1,1-difluoro-1-chloroethane in an amount of at least 20% by weight of the total weight of the blowing agent mixture. 5. Expandable particles according to any one of claims 1 to 4, wherein the blowing agent also contains 1,1,1-trichloroethane. 6, (A) alkenyl aromatic polymer and (B) (a
) 1,1-difluoro-1-chloroethane and (b) (
It is characterized by comprising a blowing agent consisting of one or more of the following: 1) normal pentane, (2) isopentane, (3) neopentane, or (4) a mixture of any one of (1), (2), and (3) above. Inflated articles. 7. Alkenyl aromatic polymer and 1,1-difluoro-
A method for producing expandable alkenyl aromatic polymer particles by extruding a thermoplasticized mixture of 1-chloroethane and a blowing agent characterized in that it consists of at least one of n-pentane, isopentane and neopentane. 8. The method according to claim 6, wherein the pentane is n-pentane. 9,1,1-difluoro-1-chloroethane and (1
) Use of a mixture as a blowing agent for alkenyl aromatic polymers, characterized in that it consists of one or more of normal pentane, (2) isopentane and (3) neopentane.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/247,195 US4912140A (en) | 1988-09-21 | 1988-09-21 | Expandable and expanded alkenyl aromatic polymer particles |
| US247195 | 1988-09-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02115241A true JPH02115241A (en) | 1990-04-27 |
Family
ID=22933979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1242374A Pending JPH02115241A (en) | 1988-09-21 | 1989-09-20 | Expansive and expanded alkenyl aromatic polymer particle |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4912140A (en) |
| EP (1) | EP0360570A1 (en) |
| JP (1) | JPH02115241A (en) |
| MX (1) | MX166043B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5120481A (en) * | 1989-02-28 | 1992-06-09 | U.C. Industries, Inc. | Process for preparing extruded foam bodies |
| ES2075077T3 (en) * | 1989-02-28 | 1995-10-01 | Uc Ind Inc | PROCESS FOR PREPARING EXTRUDED FOAM BODIES. |
| US5423607A (en) * | 1991-05-03 | 1995-06-13 | Dolco Packaging Corp. | Method for blending diverse blowing agents |
| US5269987A (en) * | 1992-12-22 | 1993-12-14 | Reedy Michael E | Process for producing alkenyl aromatic foams using a combination of atmospheric and organic gases and foams produced thereby |
| DE10241298A1 (en) * | 2002-09-04 | 2004-03-18 | Basf Ag | Process for the production of polystyrene foam particles with low bulk density |
| EP2267065A1 (en) * | 2009-06-22 | 2010-12-29 | Total Petrochemicals Research Feluy | Expandable vinyl aromatic polymers and process for the preparation thereof |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1399067A (en) * | 1963-06-19 | 1965-05-14 | Shell Int Research | Process for the production of aerated thermoplastic polymers |
| US3413387A (en) * | 1965-06-04 | 1968-11-26 | Haveg Industries Inc | Concentric extrusion |
| US3539473A (en) * | 1967-09-21 | 1970-11-10 | Dow Chemical Co | Method for the preparation of foamed sheet and product obtained thereby |
| US3960792A (en) * | 1968-07-10 | 1976-06-01 | The Dow Chemical Company | Plastic foam |
| US3819547A (en) * | 1973-07-09 | 1974-06-25 | Arco Polymers Inc | Self-extinguishing polymer compositions containing hexabromo-2-butene |
| CA1086450A (en) * | 1976-02-03 | 1980-09-23 | Kyung W. Suh | Styrene polymer foam and preparation thereof |
| US4636527A (en) * | 1985-04-12 | 1987-01-13 | The Dow Chemical Company | Method for the preparation of styrene polymer foam and foam prepared thereby |
| US4694026A (en) * | 1985-05-24 | 1987-09-15 | The Dow Chemical Company | Polyolefin foam compositions having improved dimensional stability utilizing certain unsaturated nitrogen-containing compounds and process for making same |
-
1988
- 1988-09-21 US US07/247,195 patent/US4912140A/en not_active Expired - Fee Related
-
1989
- 1989-09-20 JP JP1242374A patent/JPH02115241A/en active Pending
- 1989-09-20 MX MX017617A patent/MX166043B/en unknown
- 1989-09-20 EP EP89309536A patent/EP0360570A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| US4912140A (en) | 1990-03-27 |
| EP0360570A1 (en) | 1990-03-28 |
| MX166043B (en) | 1992-12-16 |
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